Jillian Michaels Sued Over Diet Supplement

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arrives at the 67th Annual Golden Globe Awards held at The Beverly Hilton Hotel on January 17, 2010 in Beverly Hills, California.

Updated at 2:45 PM PDT on Wednesday, Feb 10, 2010

A California woman is suing Jillian Michaels, claiming the celebrity trainer is endorsing a diet supplement that contains false advertising.

Christie Christensen on Tuesday sued Michaels, one of the stars of NBC's "Biggest Loser." She claims she bought a product emblazoned with Michaels' picture and endorsement called "Calorie Control" last month and it has failed to lessen her appetite and she hasn't lost any weight.

Christensen is seeking class-action status for her claims, which include untrue and misleading advertising. She is also suing Calorie Control's maker, Utah-based Basic Research.

Michaels agent did not immediately return a call seeking comment. Basic Research said the company may issue a statement later today.